diff --git a/comm/const.go b/comm/const.go
index 0f47ce036..576d9fc3f 100644
--- a/comm/const.go
+++ b/comm/const.go
@@ -295,6 +295,7 @@ const (
 	ResFriend     = "friendPoint" //友情点
 	StarCoin      = "starcoin"    //星座币
 	SociatyCoin   = "guildcoin"   //公会币
+	ArenaCoin     = "arenacoin"   //竞技场币
 )
 const (
 	Gold    int32 = 1 //金币
diff --git a/modules/user/module.go b/modules/user/module.go
index 2eac87352..7d2e1bc07 100644
--- a/modules/user/module.go
+++ b/modules/user/module.go
@@ -326,6 +326,14 @@ func (this *User) change(session comm.IUserSession, attr string, add int32) (cha
 			}
 		}
 		change.Guildcoin += add
+	case comm.ArenaCoin:
+		if add < 0 {
+			if userEx.ArenaCoin+add < 0 {
+				code = pb.ErrorCode_UserSociatyCoinNoEnough
+				return
+			}
+		}
+		change.Guildcoin += add
 	default:
 		err = errors.New(fmt.Sprintf("%s no supported", attr))
 		return